Residents and hobbyists are invited to see some 20 homes and businesses harnessing solar power in the area as part of Saturday's 5th Annual Pittsburgh Solar Tour.

“People can go to places within their neighborhood or maybe take a little bit of a trip farther out to see the solar installations that are throughout the region,” said Lauren Fraley, director of communications at Citizens for Pennsylvania’s Future, or PennFuture, the event’s organizer.

According to the environmental group PennFuture, runoff that is not managed properly can cause flooding and carry pollutants — heavy metals, sediment and nutrients — into waterways, but municipalities now have the option to create authorities to address these issues.

George Jugovic, chair of PennFuture’s law staff, said this is a big issue that people don’t usually consider.